4cm Dilated, 100% Effaced, No Contractions

I'm 38 weeks, 4 cm dilated, 100% effaced with no contractions, and having bloody show ever since my vaginal exam 3 days ago. Does this mean I should be going into labor soon? This is my second pregnancy and with my first I didn't know I was 6 cm dilated until they checked me since I didn't have any contractions. They made me stay at the hospital then to see if I would dilate further but didn't so they broke my water. Then I had my baby girl 30 minutes later. With this pregnancy my doctor told me to wait til I get contractions or my water breaks but I don't think that's going to happen. What should I do?